element (a) has atomic number 20 and (b) has 15. What will be the formula of the compound formed between (a) and (b)​

4nh3+5o2--> 4no+6h20what is the total number of moles of h2o produced when 12 mole of nh3 is completely consumed?

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

What does the mass of 0.7891 mol of ferric oxide (fe2o3)